$idproduct = 1 ;
$id_lang= 2; // 2 = fr en principe dans presta
$sql = 'SELECT ag.`id_attribute_group`, ag.`is_color_group`, agl.`name` AS group_name, agl.`public_name` AS public_group_name, a.`id_attribute`, al.`name` AS attribute_name,
        a.`color` AS attribute_color, pa.`id_product_attribute`, pa.`quantity`, pa.`price`, pa.`ecotax`, pa.`weight`, pa.`default_on`, pa.`reference`, pa.`unit_price_impact`, pa.`minimal_quantity`
        FROM `'._DB_PREFIX_.'product_attribute` pa
        LEFT JOIN `'._DB_PREFIX_.'product_attribute_combination` pac ON pac.`id_product_attribute` = pa.`id_product_attribute`
        LEFT JOIN `'._DB_PREFIX_.'attribute` a ON a.`id_attribute` = pac.`id_attribute`
        LEFT JOIN `'._DB_PREFIX_.'attribute_group` ag ON ag.`id_attribute_group` = a.`id_attribute_group`
        LEFT JOIN `'._DB_PREFIX_.'attribute_lang` al ON a.`id_attribute` = al.`id_attribute`
        LEFT JOIN `'._DB_PREFIX_.'attribute_group_lang` agl ON ag.`id_attribute_group` = agl.`id_attribute_group`
        WHERE pa.`id_product` = '.(int)($idproduct).'
        AND al.`id_lang` = '.(int)($id_lang).'
        AND agl.`id_lang` = '.(int)($id_lang).'
        ORDER BY agl.`public_name`, al.`name`';